Trolley-wheel.



- Www/w W,l E. MARSHALL. TROLLEY WHEEL.

APPLICATION FILED AUG. 26, 1911.

Patented July 23, 1912.

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W. E. MARSHALL.

TROLLEY WHEEL.

APPLIoATIoN FILED AUG. 26, 1911.

Patented July 23, 1912.

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W. E. MARSHALL. l

TROLLEY WHEEL.

APPLIUATION FILED AUG. zal, 1911.

1,033,333. Patented July 23,1912.

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UNITED STATES PATENT OFFICE.

WALKER E. MARSHALL, 0F DANVILLE, ILLINOIS, ASSIGNOR TO `IRA J. SCOTT, OFDANVILLE, ILLINOIS.

TROLLEY-WHEEL.

Specification of Letters Patent.

Patented July 23, 1912.

Application filed Augustv26, 1911. Serial No. 646,096.

To all whom t may concern:

Be it known that I, IVALKER E. ll/IARsi-IALL, a citizen of the UnitedStates, and a resident of the city of Danville, county of Vermilion, andState of Illinois, have invented certain new and useful Improvements inTrolley-lllheels, of which the following is a specification.

My invention relates to improvements in trolley wheels and has for itsobject the provision of a trolley wheel of improved construction andoperation.

The invention consists in the combinations and arrangements of partshereinafter described and claimed.

The invention will be best understood by reference to the accompanyingdrawings forming a part of this specification, and in which,

Figure 1 is a rear elevation of the trolley wheel shown partially insection, Fig. 2, top plan view thereof shown partially in sec-tion, Fig.3, a side elevation of the trolley wheel shown partially in section,Fig. 4, an enlarged section of one of the guard arms employed in thedevice, Fig. 5, a side elevation shown partially in section, of amodified form of construction, and Fig. 6, a rear elevation of themodified form shown partially in sect-ion.

The preferred form of construction as illustrated in the drawingscomprises a harp 1 of any usual or desired construction and a wheel 2mounted in said harp in any usual or desired manner. At. its upperportion at each side of harp 1 is provided a laterally extending lug 3upon which is formed a bearing 4 as indicated. Upwardly extending studs5 are provided at their lower ends with outwardly turned pivoting arms 6which bear in bearings 4. Hollow guard arms 7 having angularly turnedends 8 are mounted on studs 5 and are provided with substantiallyV-shaped slots 9 in their outer walls. Each of the studs 5 carries ascrew 10 projecting through the slot 9 in the corresponding guard arm 7,and a compression spring 11 is inclo-sed in each of the arms 7 andbea-rs against the end of the corresponding stud 5. Each of the pivotingarms 6 carries a bearing arm 12 projecting laterally from each sidethereof and contacting with a spring 13 which is secured to the underside of lug 3 as shown. Spring 13 serves to normally maintain thecorresponding stud 5 in a `vertical position but permits of oscillationsof said stud in either direct-ion. The ends of .spring 18 are providedwith lips 14 adapted to prevent the ends of arm 12 from slipping off ofthe ends of said spring. By this arrangement it will be observed thatwhen the trolley encounters a suspension member or other similarobstruction, arms 7 contact-ing with said obstruction will be swungcircumferentially with respect to wheel 2 and arms 8 also contactingwith said obstruction will cause longitudinal movement of arms 7 onstuds 5, and

= this longitudinal movement will cause rotation of arms 8 out of thepath of said obstruction due to the action of pins 10 in slots 9. Bymaking slots 9 substantially V- shaped in form as indicated provision ismade for swinging of arms 7 in either' direction. Thus it will beobserved that the trolley will be held against accidental disengagementwith the trolley wire and at the same time readily pass obstructions.

The construction set forth will be found tobe a simple and efficientmeans for the purpose.

Arms 7 are provided with eyes 15 through which may be attached cords 16for the purpose o-f moving arms 7 to inoperative positions when desired.A housing 17 is placed around bearing 4 and spring 13 to exclude dust.

In the modified formof construct-ion illustrated in Figs. 5 and 6 thebearings 18 for the pivoting shaftof wheel 2 are extended laterally ateach side of the harp l and are dressed on their outer sides toconstitute pivoting studs. The studs 5 in this construction are providedat their lower ends with outer and downwardly extending portions mountedon hubs 19 which are given a bearing on pivoting studs 18. Thisfurnishes a simple and convenient construction for mounting studs 5 andalso necessitates the oscillations of studs 5 on the axis'of wheel 2.Each of the hubs 19 carries a laterally extending bearing bar 20 whichcontacts with the positioning springs 21 carried by a lug 22 provided atthe corresponding side of harp 1. Springs 21 thus serve as a means fornormally holding studs 5 in operative positions as before. Otherwise theconstruction is identical with the construction illustrated in Figs. lto 4 inclusive with the exception of a slight difference in form inhousing 17. l

l/hile I have illustrated and described the preferred forms ofconstruction for carrying my invention into effect, this is capable ofvariation and modification without departing from the spirit of theinvention. I, therefore, do not wish to be limited to the precisedetails of construction as set fort-b, but desire to avail myself ofsuch variations and modifications as come within the scope of theappended claims.

Having described my invention what I claim as new and desire to secureby Letters Patent is:

l. In a device of the class described, the combination with a harp and atrolley wheel mounted in said harp, of an upwardly eX- tending studpivoted on said harp to swing circumferentially with respect to saidwheel; a guard arm mounted on said stud for longitudinal and rotarymovement with respect to said stud; and means for causing rotarymovement of said arm upon longitudinal movement thereof, substantiallyas described.

2. In a device of the class described, the combination with a harp and atrolley wheel mounted in said harp, of an upwardly extending studpivoted on said harp to swing circumferentially with respect to saidwheel; a guard arm telescoping said stud and provided with a slotarranged at an angle to the axis of said stud; and a pin on said studengaging said slot, substantially as described.

3. In a device of the class described, the combination with a harp and atrolley wheel mounted in said harp, of an upwardly eX- tending studpivoted on said harp to swing circumferentially with respect to saidwheel; a guard arm telescoping said stud and pro` vided with a slotarranged at an angle to the axis of said stud, a pin on said studengaging said slot; and a spring normally holding said arm in operativeposition, substantially as described.

4. In a device of the class described, the combination with a harp and atrolley wheel mounted in said harp; of an upwardly eX- tending studpivot-ed on said harp to swing circumferentially with respect to saidwheel; a hollow guard arm telescoping said stud and provided with asubstantially V-shaped slot; and a pin carried by said stud and engagingsaid slot, substantially as described.

In a device of the class described, the combination with a harp and atrolley wheel mounted in said harp; of an upwardly eX- tending studpivoted on said harp to swing circumferentially with respect to saidwheel; a hollow guard arm telescoping said stud and provided with asubstantially V-shaped slot; a compression spring in said guard armcontacting with the end of said stud; and a pin carried by said stud andengaging said slot, substantially as described.

6. In a device of the class described, the combination with a harp and atrolley wheel mounted in said harp, of an upwardly eX- tending studpivoted on said harp at each side thereof to swing circumferentiallywith respect to said wheel; guard arms mounted on said studs forlongitudinal and rotary movements with respect to said studs; and meansfor causing rotary movements of said arms upon longitudinal movementsthereof, substantially as described.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

VALKER E. MARSHALL.

Witnesses CHESTER W. ALBRIGHT, ALFRED A. JOHNSON.

Copies of this patent may be obtained for iive cents each, by addressingthe Commissioner of Patents, Washington, D. C.

